用java做图书借阅管理系统。具体如下
最佳答案
建立一个图书借阅管理系统需要考虑多个方面，包括用户管理、图书管理、借阅和还书等。下面是一个简单的Java图书借阅管理系统的示例，其中包含用户管理、图书管理、借阅和还书功能：
用户管理
创建一个用户类，用于存储用户信息，例如用户名、密码等。在系统中创建一个用户注册和登录的功能，让用户可以注册和登录账户。
```java
public class User {
private String username;
private String password;
public User(String username, String password) {
this.username = username;
this.password = password;
}
public String getUsername() {
return username;
}
public String getPassword() {
return password;
}
public void setUsername(String username) {
this.username = username;
}
public void setPassword(String password) {
this.password = password;
}
}
```
图书管理
创建一个图书类，用于存储图书信息，例如书名、作者、出版社、ISBN等。在系统中创建一个图书添加和删除的功能，让用户可以添加和删除图书信息。
```java
public class Book {
private String title;
private String author;
private String publisher;
private String ISBN;
public Book(String title, String author, String publisher, String ISBN) {
this.title = title;
this.author = author;
this.publisher = publisher;
this.ISBN = ISBN;
}
public String getTitle() {
return title;
}
public String getAuthor() {
return author;
}
public String getPublisher() {
return publisher;
}
public String getISBN() {
return ISBN;
}
public void setTitle(String title) {
this.title = title;
}
public void setAuthor(String author) {
this.author = author;
}
public void setPublisher(String publisher) {
this.publisher = publisher;
}
public void setISBN(String ISBN) {
this.ISBN = ISBN;
}
}
```
借阅管理
创建一个借阅类，用于存储借阅信息，例如借阅者、借阅时间、归还时间、借阅图书编号等。在系统中创建一个借阅记录查询的功能，让用户可以查询借阅记录。
```java
public class Library {
private User user;
private Book book;
private int LibraryCount = 0;
public Library(User user, Book book) {
this.user = user;
this.book = book;
this.LibraryCount = 0;
}
public User getUser() {
return user;
}
public Book getBook() {
return book;
}
public int getLibraryCount() {
return LibraryCount;
}
public void addBorrower() {
if (LibraryCount == 0) {
System.out.println("Library is full!");
} else {
System.out.println("User " + user.getUsername() + " borrowed book " + book.getISBN() + " at " + new Date().getTime());
User newUser = new User(user.getUsername(), book.getISBN());
user.setUsername(newUser.getUsername());
book.setPublisher(newUser.getPublisher());
book.setISBN(newUser.getISBN());
LibraryCount++;
System.out.println("Library has " + LibraryCount + " borrowed books.");
}
}
public void removeBorrower() {
if (LibraryCount == 0) {
System.out.println("Library is full!");
} else {
User user = user.getUser();
int index = book.getISBN().indexOf(user.getUsername());
if (index > -1) {
System.out.println("User " + user.getUsername() + " borrowed book " + book.getISBN() + " before being borrowed by " + user.getUsername());
book.setISBN(book.getISBN() + "_" + index + "_");
LibraryCount--;
System.out.println("Library has " + LibraryCount + " borrowed books after being borrowed by " + user.getUsername());
} else {
book.setISBN(book.getISBN() + "_" + index + "_");
}
System.out.println("Library has " + LibraryCount + " borrowed books after being borrowed by " + user.getUsername());
}
}
public void归还Borrower() {
if (LibraryCount == 0) {
System.out.println("Library is full!");
} else {
User user = user.getUser();
int index = book.getISBN().indexOf(user.getUsername());
if (index > -1) {
System.out.println("User " + user.getUsername() + " returned book " + book.getISBN() + " to library");
book.setISBN(book.getISBN() + "_" + index + "_");
LibraryCount--;
System.out.println("Library has " + LibraryCount + " borrowed books after being returned by " + user.getUsername());
} else {
book.setISBN(book.getISBN() + "_" + index + "_");
}
System.out.println("Library has " + LibraryCount + " borrowed books after being returned by " + user.getUsername());
}
}
}
```
主程序
创建一个主程序，用于实现借阅管理系统的功能。
```java
public class Main {
public static void main(String[] args) {
User user = new User("Alice", "123456", "ABC出版社", "ISBN 123456789");
Book book = new Book("The Catcher in the Rye", "J.D. Salinger", "ISBN 0525500002");
Library library = new Library(user, book);
library.addBorrower();
library.removeBorrower();
library.归还Borrower();
System.out.println("Library is now empty!");
}
}
```
上述代码仅供参考，具体实现还需要根据实际需求进行修改。
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